Dry ice is formed by condensing carbon dioxide into colorless liquid under the pressure of 6250.5498 kPa, and then rapidly solidifying under high pressure.
When dry ice sublimates sharply, it will quickly reduce the temperature of the surrounding air. When it is heated and turned into gas, it will condense the water vapor in the nearby air into countless small water droplets, and the water vapor in the air will condense into fog, which is the charming fairyland effect at the wedding. Because the specific gravity of carbon dioxide is 1.5 times that of air, it forms low smoke, so it will not be dispersed quickly.